Vulnerability Details CVE-2026-42476
Two heap-based out-of-bounds read vulnerabilities in the STL ASCII file parser in Open CASCADE Technology (OCCT) V8_0_0_rc5 exist in RWStl_Reader::ReadAscii because buffers returned by Standard_ReadLineBuffer::ReadLine() are not properly length-validated before strncasecmp or direct byte access. User-assisted attackers can trigger these issues by persuading a victim to open a crafted STL file with extremely short lines, resulting in a denial of service or possible information disclosure.
Exploit prediction scoring system (EPSS) score
CVSS Severity
CVSS v3 Score 7.1
Products affected by CVE-2026-42476
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cpe:2.3:a:opencascade:open_cascade_technology:6.5.0
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cpe:2.3:a:opencascade:open_cascade_technology:6.5.1
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cpe:2.3:a:opencascade:open_cascade_technology:6.5.2
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cpe:2.3:a:opencascade:open_cascade_technology:6.5.3
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cpe:2.3:a:opencascade:open_cascade_technology:6.5.4
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cpe:2.3:a:opencascade:open_cascade_technology:6.5.5
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cpe:2.3:a:opencascade:open_cascade_technology:6.6.0
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cpe:2.3:a:opencascade:open_cascade_technology:6.7.0
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cpe:2.3:a:opencascade:open_cascade_technology:6.7.1
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cpe:2.3:a:opencascade:open_cascade_technology:6.7.2
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cpe:2.3:a:opencascade:open_cascade_technology:6.8.0
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cpe:2.3:a:opencascade:open_cascade_technology:6.9.0
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cpe:2.3:a:opencascade:open_cascade_technology:6.9.1
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cpe:2.3:a:opencascade:open_cascade_technology:7.0.0
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cpe:2.3:a:opencascade:open_cascade_technology:7.0.1
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cpe:2.3:a:opencascade:open_cascade_technology:7.1.0
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cpe:2.3:a:opencascade:open_cascade_technology:7.2.0
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cpe:2.3:a:opencascade:open_cascade_technology:7.3.0
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cpe:2.3:a:opencascade:open_cascade_technology:7.4.0
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cpe:2.3:a:opencascade:open_cascade_technology:7.5.0
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cpe:2.3:a:opencascade:open_cascade_technology:7.5.1
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cpe:2.3:a:opencascade:open_cascade_technology:7.5.2
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cpe:2.3:a:opencascade:open_cascade_technology:7.5.3
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cpe:2.3:a:opencascade:open_cascade_technology:7.6.0
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cpe:2.3:a:opencascade:open_cascade_technology:7.6.1
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cpe:2.3:a:opencascade:open_cascade_technology:7.6.2
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cpe:2.3:a:opencascade:open_cascade_technology:7.6.3
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cpe:2.3:a:opencascade:open_cascade_technology:7.7.0
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cpe:2.3:a:opencascade:open_cascade_technology:7.7.1
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cpe:2.3:a:opencascade:open_cascade_technology:7.7.2
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cpe:2.3:a:opencascade:open_cascade_technology:7.8.0
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cpe:2.3:a:opencascade:open_cascade_technology:7.8.1
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cpe:2.3:a:opencascade:open_cascade_technology:7.9.0
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cpe:2.3:a:opencascade:open_cascade_technology:7.9.1
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cpe:2.3:a:opencascade:open_cascade_technology:7.9.2
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cpe:2.3:a:opencascade:open_cascade_technology:7.9.3
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cpe:2.3:a:opencascade:open_cascade_technology:8.0.0